A frequency magnetically tunable perfect absorber based on graphene in the terahertz (THz) region is proposed. The performance analysed using 4 × transfer matrix method, demonstrating that absorption of proposed for a left-handed circularly polarized (LCP) wave can be dynamically tuned by varying external static bias magnetic field three ranges (0.95–2.2 THz, 4.15–5.4 and 7.3–8.55 THz). Due to ...

We have fabricated resonant terahertz metamaterials on free-standing polyimide substrates. The low-loss polyimide substrates can be as thin as 5.5μm yielding robust large-area metamaterials which are easily wrapped into cylinders with a radius of a few millimeters. Our results provide a path forward for creating multi-layer non-planar metamaterials at terahertz frequencies. (Some figures in thi...

A low terahertz broadband tunable absorber was proposed, which composed of vanadium oxide (VO2) film and nematic liquid crystal layer. The simulation results show that the absorption is great than 90% in frequency range 0.458–1.1492 THz. tuning realized by increasing temperature to modulate VO2 transited into metal state. Since dielectric constant can be adjusted bias voltage, without changing ...

Terahertz (THz) radiation offers researchers many intriguing possibilities, ranging from fundamental science through to applications in communications, noninvasive imaging, and other areas. The THz region (~0.1 THz to ~10 THz) is often described as the last frontier of the electromagnetic spectrum because of the relatively low maturity level of components and systems that operate in this region...

Detection peculiarities of an un-cooled (room temperature) 8×8 pixel array designed to image broadband THz radiation were investigated. Each pixel consists of a thin conductive film absorber on a dielectric membrane with thermopile temperature readout. It was designed and tested for four combinations of two different types of absorber and thermopile materials. The photo-response profile, determ...